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During 1999, there were six fatalities in surface mines involving haulage equipment colliding with a smaller vehicle or person, or backing over the edge of a dump point. All of these fatalities can be attributed to the extensive blind areas around large haulage equipment. Researchers at NIOSH are investigating various technologies that can be used to monitor these blind areas and provide information on nearby obstacles to an operator. So far, the following technologies: Electromagnetic Signal Detection, Radar, and Video Cameras, have been tested on dump trucks used in surface mining. The selection of these systems was based on their ability to handle the tough environmental conditions found in mining operations and how well they detected obstacles out to 40 or 50 feet beyond the rear of large dump trucks. Some of the manufacturers of available collision warning camera systems are listed.